Added newer crafting weapons to the FGD

+weapon_zs_manhack
+weapon_zs_waraxe
weapon_zs_manhack -> weapon_zs_manhack_saw
Merge pull request #20 from BClark09/patch-1

Added newer crafting weapons to the FGD
Fix slug rifle always showing 9999 damage.
Created inert weapon base for hammer made weapons

Weapons using this base:
- Cannot be selected from the player's HUD
- Cannot be dropped or seen in-game
- Switch to "weapon_zs_fists" if switched to forcefully
Added support for hammer made weapons in ZE

- Restricted each player to using only one of these special weapons per
round.
Moved CSSWEAPONS from global to local

There's no reason to have it in globals if it's only used in one place
Fix func_noair not working.
Fix breath instantly filling when leaving func_noair.
Fix up fast zombie pounce behavior.

Pounces no longer hit the floor.
Pouncing facing down will no longer pounce upwards.
Reduced pounce hit box size 32 -> 24
Fast Zombie pounce reach 32 -> 26
Merge pull request #26 from BClark09/master

Added support for hammer made weapons and enabled them on ZE
Fix IsNailedToWorldHierarchy + prop_playergib errors.
Merge branch 'master' of https://github.com/JetBoom/zombiesurvival